I loved the fast, agile Pkunk and Spathi. Whittling away for teh win! I could use Spathi for zero-loss Vux farming and amass a fortune if I wanted. Fast ships are also useful against the slow Mycon. If you time your pass just right, you end up behind the Mycon ship just as it fires, causing to hit itself. Never did like the Orz though, couldn't get the hang of rotating the cannon while flying around.
As for the Ilwrath, once I had the whole "enemy is diagonally opposite of you" thing down, killing them became a breeze so long as I could keep out of their range.
My favorite "fun" ship had to be the Thraddash Torch though. >
